MUNISING, Michigan — Authorities say snowmobilers from Wisconsin and Illinois have died in separate crashes this week in Michigan's Upper Peninsula.

The Alger County sheriff's department says 44-year-old Jeffery Togstad of Weyauwega, Wisconsin, died following a crash Thursday. Investigators say he was riding with a group on Trail 417 when he lost control of the snowmobile and crashed.

On Tuesday, the sheriff's department says 45-year-old Donald Stagner of New Lenox, Illinois, died following a crash when he failed to negotiate a corner on Trail 7.

Authorities say excessive speed is believed to be a factor in both crashes, which are under investigation.